Measure the ID of the OEM outlet adapter which when installed is inserted INTO the OEM interooler's inlet and outlet Rob. That's where the restriction lies. When utilizing OEM connectors, you're limited to the ID of the OEM inlet/outlet adapter which are certainly not 2.4", but less than 2" ID.

If one were to try to re-use the accordion style OE coupler with any new high flow outlet, for reasons unknown, then agree it would be less ID at around 2.1". A standard straight 2.5" ID coupler will correct this condition.

The point was that the use of the OE style circlip connections on an IC itself, is of no restriction. Here is an adapter that shows as such.

Rob

Would it be possible to get the kit with some kind of adapter that would support the VRSF hot side and connect to the IC. I preferred to keep my HPF IC as this is quite effective even with the original couplers.
If the kit does not support the IC coupler, do you Rob have a coupler that would make it all work well? I think that my RB turbos would like the more free flowing hotside ;0)

Would it be possible to get the kit with some kind of adapter that would support the VRSF hot side and connect to the IC. I preferred to keep my HPF IC as this is quite effective even with the original couplers.
If the kit does not support the IC coupler, do you Rob have a coupler that would make it all work well? I think that my RB turbos would like the more free flowing hotside ;0)

Would it be possible to get the kit with some kind of adapter that would support the VRSF hot side and connect to the IC. I preferred to keep my HPF IC as this is quite effective even with the original couplers.
If the kit does not support the IC coupler, do you Rob have a coupler that would make it all work well? I think that my RB turbos would like the more free flowing hotside ;0)

You can use your OEM accordion adapter.

Okay and it would not be damaged in any way? I would still be able to go back to Original setup?

That specific adapter you linked is an aftermarket solution and if you were to use that adapter you're still restricting the intake tract going from 2.5" to 2.3". The OEM connector which 99% of customers are limited to using neck down to around 2".

Every upgraded outlet option available goes ranges from 1.75" to 2" at the turbo outlet and merges into a 2.5" collector at the intercooler. With the OEM connection, you'd then neck down to 2".

That's a bottle neck. Word it however you'd like but it's a restriction in the intake tract.

Your aluminum outlet here is a 2.5" OD (Outer Diameter) pipe with about a 0.060" wall thickness, no? So when you consider both walls (on the diameter) your part has an ID (Inner Diameter) of about 2.38", which is right inline with the adapter shown in the attached picture.

This is unlike the silicone options (vs. aluminum options) as they are measured in ID. So a 2.5" silicone size is TRULY a 2.5" ID, whereas a 2.5" aluminum size is TRULY a 2.38" ID. Unless you've sourced some special 2.5" ID aluminum tubing, then my apologies as this would not be the norm and probably is really in a Metric standard (if the case).

So as for the guys running these aluminum high flow outlets looking for max flow with IC's with OE connections, they are still good to go with an adapter as I've pictured. All they need is a 2.5" straight silicone coupler, and voila beautiful solution without having to condemn the otherwise high quality IC.

That specific adapter you linked is an aftermarket solution and if you were to use that adapter you're still restricting the intake tract going from 2.5" to 2.3". The OEM connector which 99% of customers are limited to using neck down to around 2".

Every upgraded outlet option available goes ranges from 1.75" to 2" at the turbo outlet and merges into a 2.5" collector at the intercooler. With the OEM connection, you'd then neck down to 2".

That's a bottle neck. Word it however you'd like but it's a restriction in the intake tract.

Your aluminum outlet here is a 2.5" OD (Outer Diameter) pipe with about a 0.060" wall thickness, no? So when you consider both walls (on the diameter) your part has an ID (Inner Diameter) of about 2.38", which is right inline with the adapter shown in the attached picture.

This is unlike the silicone options (vs. aluminum options) as they are measured in ID. So a 2.5" silicone size is TRULY a 2.5" ID, whereas a 2.5" aluminum size is TRULY a 2.38" ID. Unless you've sourced some special 2.5" ID aluminum tubing, then my apologies as this would not be the norm and probably is really in a Metric standard (if the case).

So as for the guys running these aluminum high flow outlets looking for max flow with IC's with OE connections, they are still good to go with an adapter as I've pictured. All they need is a 2.5" straight silicone coupler, and voila beautiful solution without having to condemn the otherwise high quality IC.

Thanks,
Rob

Quote:

Originally Posted by Rob@RBTurbo

Quote:

Originally Posted by Tiago@VRSF

That specific adapter you linked is an aftermarket solution and if you were to use that adapter you're still restricting the intake tract going from 2.5" to 2.3". The OEM connector which 99% of customers are limited to using neck down to around 2".

Every upgraded outlet option available goes ranges from 1.75" to 2" at the turbo outlet and merges into a 2.5" collector at the intercooler. With the OEM connection, you'd then neck down to 2".

That's a bottle neck. Word it however you'd like but it's a restriction in the intake tract.

Your aluminum outlet here is a 2.5" OD (Outer Diameter) pipe with about a 0.060" wall thickness, no? So when you consider both walls (on the diameter) your part has an ID (Inner Diameter) of about 2.38", which is right inline with the adapter shown in the attached picture.

This is unlike the silicone options (vs. aluminum options) as they are measured in ID. So a 2.5" silicone size is TRULY a 2.5" ID, whereas a 2.5" aluminum size is TRULY a 2.38" ID. Unless you've sourced some special 2.5" ID aluminum tubing, then my apologies as this would not be the norm and probably is really in a Metric standard (if the case).

So as for the guys running these aluminum high flow outlets looking for max flow with IC's with OE connections, they are still good to go with an adapter as I've pictured. All they need is a 2.5" straight silicone coupler, and voila beautiful solution without having to condemn the otherwise high quality IC.

Thanks,
Rob

Thanks Rob
Can you advice where the 2,5" straight silicone coupler can be bought? And will it work/ fit the N54?